Med Biol Eng Comput - Characterization of skin dermis microcirculation in flow-mediated dilation using optical sensor with pressurization mechanism.

Tópicos

{ blood(1257) pressur(1144) flow(957) }
{ use(976) code(926) identifi(902) }
{ result(1111) use(1088) new(759) }
{ imag(1057) registr(996) error(939) }
{ studi(1119) effect(1106) posit(819) }
{ age(1611) year(1155) adult(843) }
{ can(981) present(881) function(850) }
{ analysi(2126) use(1163) compon(1037) }
{ high(1669) rate(1365) level(1280) }
{ system(1976) rule(880) can(841) }
{ measur(2081) correl(1212) valu(896) }
{ featur(3375) classif(2383) classifi(1994) }
{ risk(3053) factor(974) diseas(938) }
{ gene(2352) biolog(1181) express(1162) }
{ health(1844) social(1437) communiti(874) }
{ inform(2794) health(2639) internet(1427) }
{ sequenc(1873) structur(1644) protein(1328) }
{ network(2748) neural(1063) input(814) }
{ patient(2315) diseas(1263) diabet(1191) }
{ motion(1329) object(1292) video(1091) }
{ assess(1506) score(1403) qualiti(1306) }
{ control(1307) perform(991) simul(935) }
{ model(2220) cell(1177) simul(1124) }
{ method(984) reconstruct(947) comput(926) }
{ case(1353) use(1143) diagnosi(1136) }
{ data(3963) clinic(1234) research(1004) }
{ model(3480) simul(1196) paramet(876) }
{ medic(1828) order(1363) alert(1069) }
{ signal(2180) analysi(812) frequenc(800) }
{ time(1939) patient(1703) rate(768) }
{ patient(1821) servic(1111) care(1106) }
{ use(1733) differ(960) four(931) }
{ survey(1388) particip(1329) question(1065) }
{ estim(2440) model(1874) function(577) }
{ method(2212) result(1239) propos(1039) }
{ model(3404) distribut(989) bayesian(671) }
{ can(774) often(719) complex(702) }
{ imag(1947) propos(1133) code(1026) }
{ data(1737) use(1416) pattern(1282) }
{ bind(1733) structur(1185) ligand(1036) }
{ method(1219) similar(1157) match(930) }
{ imag(2830) propos(1344) filter(1198) }
{ imag(2675) segment(2577) method(1081) }
{ take(945) account(800) differ(722) }
{ studi(2440) review(1878) systemat(933) }
{ treatment(1704) effect(941) patient(846) }
{ surgeri(1148) surgic(1085) robot(1054) }
{ framework(1458) process(801) describ(734) }
{ problem(2511) optim(1539) algorithm(950) }
{ error(1145) method(1030) estim(1020) }
{ chang(1828) time(1643) increas(1301) }
{ learn(2355) train(1041) set(1003) }
{ concept(1167) ontolog(924) domain(897) }
{ clinic(1479) use(1117) guidelin(835) }
{ algorithm(1844) comput(1787) effici(935) }
{ extract(1171) text(1153) clinic(932) }
{ method(1557) propos(1049) approach(1037) }
{ data(1714) softwar(1251) tool(1186) }
{ design(1359) user(1324) use(1319) }
{ care(1570) inform(1187) nurs(1089) }
{ general(901) number(790) one(736) }
{ search(2224) databas(1162) retriev(909) }
{ featur(1941) imag(1645) propos(1176) }
{ howev(809) still(633) remain(590) }
{ studi(1410) differ(1259) use(1210) }
{ perform(999) metric(946) measur(919) }
{ research(1085) discuss(1038) issu(1018) }
{ system(1050) medic(1026) inform(1018) }
{ import(1318) role(1303) understand(862) }
{ model(2341) predict(2261) use(1141) }
{ visual(1396) interact(850) tool(830) }
{ compound(1573) activ(1297) structur(1058) }
{ perform(1367) use(1326) method(1137) }
{ spatial(1525) area(1432) region(1030) }
{ record(1888) medic(1808) patient(1693) }
{ health(3367) inform(1360) care(1135) }
{ monitor(1329) mobil(1314) devic(1160) }
{ ehr(2073) health(1662) electron(1139) }
{ state(1844) use(1261) util(961) }
{ research(1218) medic(880) student(794) }
{ patient(2837) hospit(1953) medic(668) }
{ model(2656) set(1616) predict(1553) }
{ data(2317) use(1299) case(1017) }
{ cost(1906) reduc(1198) effect(832) }
{ group(2977) signific(1463) compar(1072) }
{ sampl(1606) size(1419) use(1276) }
{ data(3008) multipl(1320) sourc(1022) }
{ first(2504) two(1366) second(1323) }
{ intervent(3218) particip(2042) group(1664) }
{ activ(1138) subject(705) human(624) }
{ use(2086) technolog(871) perceiv(783) }
{ structur(1116) can(940) graph(676) }
{ cancer(2502) breast(956) screen(824) }
{ drug(1928) target(777) effect(648) }
{ implement(1333) system(1263) develop(1122) }
{ decis(3086) make(1611) patient(1517) }
{ process(1125) use(805) approach(778) }
{ activ(1452) weight(1219) physic(1104) }
{ method(1969) cluster(1462) data(1082) }
{ detect(2391) sensit(1101) algorithm(908) }

Resumo

Blood flows out of microvessels in the dermis when pressure higher than arterial blood pressure is applied to the fingertip, and subsequently re-flows into the microcirculation when pressure is released. Both the blood outflow and the reflow characteristics of microcirculation under pressurization are associated with microvasculature, blood and blood pressure. This study describes a novel method of measuring blood inflow and outflow characteristics of dermis microcirculation. An optical sensor, which is furnished with a 571 nm wavelength light source and a photodetector, is pressed to the skin surface using a pressure higher than the human subject's systolic arterial pressure. Hemoglobin concentration by change of the blood flow amount is estimated by the Beer-Lambert law. This method is applied to the measurement of blood inflow and outflow characteristics of microcirculation caused by reactive hyperemia after ischemia with duration of 5 min. Among three parameters evaluated, the one relating to the amplitude of pulsation shows a close correlation with conventional plethysmography, while the other two show varying time responses. Our method provides a new and useful insight into pathophysiology in health and disease conditions and may help researchers better understand the underlying mechanisms of numerous microcirculation-influenced diseases and medical conditions.

Resumo Limpo

blood flow microvessel dermi pressur higher arteri blood pressur appli fingertip subsequ reflow microcircul pressur releas blood outflow reflow characterist microcircul pressur associ microvasculatur blood blood pressur studi describ novel method measur blood inflow outflow characterist dermi microcircul optic sensor furnish nm wavelength light sourc photodetector press skin surfac use pressur higher human subject systol arteri pressur hemoglobin concentr chang blood flow amount estim beerlambert law method appli measur blood inflow outflow characterist microcircul caus reactiv hyperemia ischemia durat min among three paramet evalu one relat amplitud pulsat show close correl convent plethysmographi two show vari time respons method provid new use insight pathophysiolog health diseas condit may help research better understand under mechan numer microcirculationinfluenc diseas medic condit

Resumos Similares

J Clin Monit Comput - Heart sounds analysis via esophageal stethoscope system in beagles. ( 0,897521049591603 )
J Clin Monit Comput - Continuous minimally invasive peri-operative monitoring of cardiac output by pulmonary capnotracking: comparison with thermodilution and transesophageal echocardiography. ( 0,896145977370999 )
J Clin Monit Comput - Assessment of the effect of rapid crystalloid infusion on stroke volume variation and pleth variability index after a preoperative fast. ( 0,893390337961699 )
Comput Methods Programs Biomed - In silico study of the haemodynamic effects induced by mechanical ventilation and biventricular pacemaker. ( 0,891891188712197 )
J Clin Monit Comput - Hemodynamic volumetry using transpulmonary ultrasound dilution (TPUD) technology in a neonatal animal model. ( 0,885622542760812 )
Comput Math Methods Med - Numerical study for blood flow in pulmonary arteries after repair of tetralogy of Fallot. ( 0,883743667529199 )
J Clin Monit Comput - Noninvasive continuous hemodynamic monitoring. ( 0,880813022855996 )
J Clin Monit Comput - Capability of a new paediatric oesophageal Doppler monitor to detect changes in cardiac output during testing of external pacemakers after cardiac surgery. ( 0,875978065856555 )
J Clin Monit Comput - Decrease in pulmonary artery pressure after administration of thoracic epidural anesthesia in a patient with Marfan syndrome awaiting aortic valve replacement procedure. ( 0,871379540797812 )
J Clin Monit Comput - In-line pressure within a HOTLINE? Fluid Warmer, under various flow conditions. ( 0,871010657639746 )
Med Biol Eng Comput - Arterial reservoir-excess pressure and ventricular work. ( 0,869952290956454 )
Comput Math Methods Med - Plasma volume expansion resulting from intravenous glucose tolerance test. ( 0,869581623860357 )
J Clin Monit Comput - Variations in the pre-ejection period induced by deep breathing do not predict the hemodynamic response to early haemorrhage in healthy volunteers. ( 0,868725321196981 )
Comput Math Methods Med - Mathematical analysis of non-Newtonian blood flow in stenosis narrow arteries. ( 0,867714211865552 )
J Clin Monit Comput - Assessment of cerebral oxygenation using near infrared spectroscopy during isovolemic hemodilution in pediatric patients. ( 0,866577685340545 )
J Clin Monit Comput - Pulmonary artery pulsatility is the main cause of cardiogenic oscillations. ( 0,864657466952619 )
Med Biol Eng Comput - Determinants of vascular and cardiac baroreflex sensitivity values in a random population sample. ( 0,861959455225342 )
J Clin Monit Comput - Comparison of cardiac output determined by bioimpedance and bioreactance methods at rest and during exercise. ( 0,860762154009166 )
J Clin Monit Comput - Transesophageal echocardiography and intraoperative phlebotomy during surgical repair of coarctation of aorta in a patient with atrial septal defect, moderately severe mitral regurgitation and severe pulmonary hypertension. ( 0,859576100812608 )
Med Biol Eng Comput - Cardiac oxygen supply is compromised during the night in hypertensive patients. ( 0,859339912275179 )
Med Biol Eng Comput - A coupled flow-acoustic computational study of bruits from a modeled stenosed artery. ( 0,854799221632448 )
J Clin Monit Comput - Impact of skin incision on the pleth variability index. ( 0,850802053818395 )
J Clin Monit Comput - Changes in R-Wave amplitude in DII lead is less sensitive than pulse pressure variation to detect changes in stroke volume after fluid challenge in ICU patients postoperatively to cardiac surgery. ( 0,850559394598227 )
Med Biol Eng Comput - Assessment of dynamic cerebral autoregulation and cerebral carbon dioxide reactivity during normothermic cardiopulmonary bypass. ( 0,849685121872035 )
Comput. Biol. Med. - The hemodynamic alterations induced by the vascular angular deformation in stent-assisted coiling of bifurcation aneurysms. ( 0,849279631862469 )
Med Biol Eng Comput - Model-based correction of the influence of body position on continuous segmental and hand-to-foot bioimpedance measurements. ( 0,847069357004945 )
Comput Methods Programs Biomed - Measurements of the left atrium and pulmonary veins for analysis of reverse structural remodeling following cardiac ablation therapy. ( 0,843172389574413 )
J Clin Monit Comput - Fluid responsiveness is about stroke volume, and not pulse pressure Yogi: the power of Doppler fluid management and cardiovascular monitoring. ( 0,841458694624697 )
J Clin Monit Comput - Impact of central hypovolemia on photoplethysmographic waveform parameters in healthy volunteers. Part 1: time domain analysis. ( 0,841380584210294 )
J Clin Monit Comput - Tako-tsubo cardiomyopathy and microcirculation. ( 0,840400089493177 )
Med Biol Eng Comput - Coronary-aortic interaction during ventricular isovolumic contraction. ( 0,83963979107754 )
J Clin Monit Comput - The relationship between the area of peripherally-derived pressure volume loops and systemic vascular resistance. ( 0,83962107932764 )
J Clin Monit Comput - The use of a noninvasive hemoglobin monitor for determining fluid distribution and elimination in pediatric patients undergoing minor surgery. ( 0,835614439363001 )
J Clin Monit Comput - Impact of central hypovolemia on photoplethysmographic waveform parameters in healthy volunteers part 2: frequency domain analysis. ( 0,835105704355521 )
IEEE J Biomed Health Inform - Experimental investigation of the influence of the aortic stiffness on hemodynamics in the ascending aorta. ( 0,831471089409476 )
J Clin Monit Comput - The changes of pulmonary blood flow in non-ventilated lung during one lung ventilation. ( 0,830829850959186 )
J Clin Monit Comput - Non-invasive cardiac output and oxygen delivery measurement in an infant with critical anemia. ( 0,830016197112123 )
J Clin Monit Comput - The effect of endotracheal tube cuff pressure change during gynecological laparoscopic surgery on postoperative sore throat: a control study. ( 0,829547433115215 )
Comput Math Methods Med - Simulation of the Frank-Starling Law of the Heart. ( 0,828018189987269 )
J Clin Monit Comput - A new reusable skin-protective sphygmomanometer cuff. ( 0,827535325747383 )
J Clin Monit Comput - Cardiopulmonary interactions and volume status assessment. ( 0,827341979557344 )
Comput Math Methods Med - Simulation of exercise-induced syncope in a heart model with severe aortic valve stenosis. ( 0,826255898931051 )
J Clin Monit Comput - Arterial pressure waveform derived cardiac output FloTrac/Vigileo system (third generation software): comparison of two monitoring sites with the thermodilution cardiac output. ( 0,823447653306419 )
J Clin Monit Comput - Evaluation of mean systemic filling pressure from pulse contour cardiac output and central venous pressure. ( 0,822651359028144 )
J Clin Monit Comput - The effects of cardiac output and pulmonary arterial hypertension on volumetric capnography derived-variables during normoxia and hypoxia. ( 0,82216092853605 )
J Clin Monit Comput - Respiratory and non-respiratory sinus arrhythmia: implications for heart rate variability. ( 0,820909941997951 )
J Med Syst - Mathematical models of real geometrical factors in restricted blood vessels for the analysis of CAD (coronary artery diseases) using Legendre, Boubaker and Bessel polynomials. ( 0,820797076284425 )
Comput. Biol. Med. - A semi-automated computer tool for the analysis of retinal vessel diameter dynamics. ( 0,819975183821198 )
Comput Math Methods Med - Evaluating the hemodynamical response of a cardiovascular system under support of a continuous flow left ventricular assist device via numerical modeling and simulations. ( 0,819898286153982 )
Med Biol Eng Comput - Computational model for estimating the short- and long-term cardiac response to arteriovenous fistula creation for hemodialysis. ( 0,819132382113754 )
J Clin Monit Comput - Combination of continuous pulse pressure variation monitoring and cardiac filling pressure to predict fluid responsiveness. ( 0,817399176840335 )
Comput. Biol. Med. - Modeling of heart sound morphology and analysis of the morphological variations induced by respiration. ( 0,816496580927726 )
Comput. Biol. Med. - Biomechanical behaviors of curved artery with flexible wall: a numerical study using fluid-structure interaction method. ( 0,816496580927726 )
Med Biol Eng Comput - Mechanical behaviour and rupture of normal and pathological human ascending aortic wall. ( 0,814057626332613 )
Med Biol Eng Comput - The effect of aortic wall and aortic leaflet stiffening on coronary hemodynamic: a fluid-structure interaction study. ( 0,813802848599801 )
J Clin Monit Comput - Thoracic impedance measures tissue characteristics in the vicinity of the electrodes, not intervening lung water: implications for heart failure monitoring. ( 0,813535225183817 )
J Clin Monit Comput - Arterial line for monitoring SpO2 in patients with ischemic peripheries. ( 0,813025210084034 )
J Clin Monit Comput - Transthoracic electrical bioimpedence cardiac output: comparison with multigated equillibrium radionuclide cardiography. ( 0,811765154793098 )
Comput. Biol. Med. - Numerical investigation of blood flow in three-dimensional porcine left anterior descending artery with various stenoses. ( 0,810466023359523 )
J Clin Monit Comput - Reference values for volumetric capnography-derived non-invasive parameters in healthy individuals. ( 0,80947773715275 )
J Clin Monit Comput - Continuous non-invasive monitoring improves blood pressure stability in upright position: randomized controlled trial. ( 0,806393598497987 )
Med Biol Eng Comput - The influence of intraluminal thrombus on noninvasive abdominal aortic aneurysm wall distensibility measurement. ( 0,80521558764763 )
Wiley Interdiscip Rev Syst Biol Med - Integration of cardiovascular regulation by the blood/endothelium cell-free layer. ( 0,805063653440867 )
Med Biol Eng Comput - Monitoring intracellular, interstitial, and intravascular volume changes during fluid management procedures. ( 0,804166446371264 )
J Clin Monit Comput - A model-based decision support system for critiquing mechanical ventilation treatments. ( 0,80348113560707 )
Comput Methods Programs Biomed - A model of perfusion of the healthy human lung. ( 0,802945024868147 )
Comput Math Methods Med - Impact of competitive flow on hemodynamics in coronary surgery: numerical study of ITA-LAD model. ( 0,801242236024845 )
Comput. Biol. Med. - Effect of CPAP therapy on daytime cardiovascular regulations in patients with obstructive sleep apnea. ( 0,801037727646306 )
Med Biol Eng Comput - Timing and size of flow impingement in a giant intracranial aneurysm at the internal carotid artery. ( 0,800776789435463 )
AMIA Annu Symp Proc - A semi-automated quantification of pulmonary artery dimensions in computed tomography angiography images. ( 0,800368708752561 )
J Clin Monit Comput - Additional hemodynamic measurements with an esophageal Doppler monitor: a preliminary report of compliance, force, kinetic energy, and afterload in the clinical setting. ( 0,799926699093675 )
Med Biol Eng Comput - Transesophageal left ventricular electrogram-recording and temporary pacing to improve patient selection for cardiac resynchronization. ( 0,797963581808009 )
Med Biol Eng Comput - Aortic pressure wave reconstruction during exercise is improved by adaptive filtering: a pilot study. ( 0,797801214469943 )
J Clin Monit Comput - Continuous real time endotracheal tube cuff pressure waveform. ( 0,797445250792031 )
Comput Methods Programs Biomed - Quantitative analysis of digital subtraction angiography using optical flow method on occlusive cerebrovascular disease. ( 0,797006958702989 )
Med Biol Eng Comput - Investigation of photoplethysmographic signals and blood oxygen saturation values on healthy volunteers during cuff-induced hypoperfusion using a multimode PPG/SpO2 sensor. ( 0,79608046284742 )
J Clin Monit Comput - Radial-femoral concordance in time and frequency domain-based estimates of systemic arterial respiratory variation. ( 0,795029631246603 )
Comput Math Methods Med - Evaluation of a model-based hemodynamic monitoring method in a porcine study of septic shock. ( 0,793897000852274 )
Comput Methods Programs Biomed - Mechanical ventilation and thoracic artificial lung assistance during mechanical circulatory support with PUCA pump: in silico study. ( 0,792699657710791 )
J Clin Monit Comput - A comparative study of pulse rate variability and heart rate variability in healthy subjects. ( 0,791042497192036 )
Med Biol Eng Comput - Non-invasive monitoring of central blood pressure by electrical impedance tomography: first experimental evidence. ( 0,788878191407914 )
Int J Med Robot - Haemodynamics and cardiac function during robotic-assisted laparoscopic prostatectomy in steep Trendelenburg position. ( 0,788758501115582 )
Med Biol Eng Comput - Effect of respiration on Korotkoff sounds and oscillometric cuff pressure pulses during blood pressure measurement. ( 0,788572832226705 )
J Med Syst - Human cardiovascular model and applications. ( 0,787515291631107 )
J Clin Monit Comput - Continuous measurement of cardiac output with the electrical velocimetry method in patients under spinal anesthesia for cesarean delivery. ( 0,784479329576515 )
Comput Math Methods Med - Influence of distal resistance and proximal stiffness on hemodynamics and RV afterload in progression and treatments of pulmonary hypertension: a computational study with validation using animal models. ( 0,783365068984442 )
J Clin Monit Comput - Radial artery cannulation decreases the distal arterial blood flow measured by power Doppler ultrasound. ( 0,781252793969737 )
Comput Math Methods Med - Mathematical modeling of radiofrequency ablation for varicose veins. ( 0,778467656193789 )
Comput. Biol. Med. - Simulation of a pulsatile non-Newtonian flow past a stenosed 2D artery with atherosclerosis. ( 0,775569996588474 )
Telemed J E Health - The informative contribution of the virtual medical visit in a new heart failure telemedicine integrated system. ( 0,775507017424009 )
J Clin Monit Comput - Pleth variability index-directed fluid management in abdominal surgery under combined general and epidural anesthesia. ( 0,775432645695307 )
Comput Methods Programs Biomed - Impact of pulmonary vascular stiffness and vasodilator treatment in pediatric pulmonary hypertension: 21 patient-specific fluid-structure interaction studies. ( 0,774340276657484 )
Comput. Biol. Med. - A general model for continuous noninvasive pulmonary artery pressure estimation. ( 0,774096012191637 )
Comput Math Methods Med - Computational fluid dynamics simulations of contrast agent bolus dispersion in a coronary bifurcation: impact on MRI-based quantification of myocardial perfusion. ( 0,774010372138067 )
J Clin Monit Comput - Erroneous continuous cardiac output by calibrated pulse contour analysis. ( 0,773826631055112 )
J Clin Monit Comput - The pulmonary artery catheter. ( 0,772618130456569 )
J Clin Monit Comput - Variations of the analgesia nociception index during general anaesthesia for laparoscopic abdominal surgery. ( 0,770947149294637 )
J Clin Monit Comput - Bench test assessment of mainstream capnography during high frequency oscillatory ventilation. ( 0,770456535272547 )
J Clin Monit Comput - Heart rate turbulence for guiding electric therapy in patients with cardiac failure. ( 0,766014556691983 )
J Clin Monit Comput - Cardiac output measured by uncalibrated arterial pressure waveform analysis by recently released software version 3.02 versus thermodilution in septic shock. ( 0,765050803984545 )